CN216868382U

CN216868382U - Lighting device for vehicle and lighting device for vehicle

Info

Publication number: CN216868382U
Application number: CN202220323284.8U
Authority: CN
Inventors: 金川浩章
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 2021-03-23
Filing date: 2022-02-17
Publication date: 2022-07-01
Anticipated expiration: 2032-02-17
Also published as: US11619361B2; US20220307666A1; JP2022147293A; EP4063714A1

Abstract

The utility model provides a lighting device for a vehicle and a lighting device for a vehicle, which can restrain external force from being applied to a light-emitting element. The lighting device for a vehicle according to an embodiment includes: a plate-shaped substrate having a first surface, a second surface opposite to the first surface, and a coupling portion penetrating between the first surface and the second surface; a light emitting element provided on the first surface of the substrate; and a connecting portion having a plate shape and a convex portion provided inside the connecting portion on one side end portion thereof, the connecting portion extending in a direction from the first surface toward the second surface. The front end of the projection protrudes from the first surface of the substrate. The distance between the tip of the projection and the first surface of the substrate is greater than the distance between the light exit surface of the light emitting element and the first surface of the substrate.

Description

Lighting device for vehicle and lighting device for vehicle

Technical Field

Embodiments of the present invention relate to a lighting device for a vehicle and a vehicle lamp.

Background

Wedge base bulbs without a base are used as lighting devices for vehicles. Wedge base bulbs are incandescent bulbs. Therefore, from the viewpoint of power saving and long life, wedge base lamps are being replaced with lighting devices for vehicles, which are provided with light emitting diodes.

The wedge base bulb is attached by being pushed into a socket provided in a vehicle lamp. When a vehicle lighting device including a light emitting diode is used instead of the wedge base bulb, it is preferable to continue to use a base to which the wedge base bulb is originally attached.

Therefore, a vehicle lighting device has been proposed which includes a substrate on which a light emitting diode is mounted, and a housing extending in a direction perpendicular to a surface of the substrate opposite to the light emitting diode side. A pair of leads (terminals) is provided on the case. When such a vehicle lighting device is mounted to a socket, an operator will grasp the periphery of the substrate on which the light emitting diode is mounted with a hand. In this case, if an operator touches the light emitting surface of the light emitting diode, the light emitting diode may malfunction.

Therefore, development of a technique capable of suppressing application of an external force to a light-emitting element such as a light-emitting diode has been desired.

Patent document 1: japanese patent laid-open publication No. 2013-105652

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting device for a vehicle and a lighting fixture for a vehicle, which can suppress an external force from being applied to a light emitting element.

The present invention provides a vehicle lighting device, comprising:

a plate-shaped substrate having a first surface, a second surface opposite to the first surface, and a connecting portion passing through between the first surface and the second surface;

a light emitting element provided on the first surface of the substrate; and

and a connecting portion having a plate shape and a convex portion provided inside the connecting portion on one side end portion thereof, the connecting portion extending in a direction from the first surface toward the second surface.

The front end of the projection protrudes from the first surface of the substrate.

The distance between the tip of the projection and the first surface of the substrate is greater than the distance between the light exit surface of the light emitting element and the first surface of the substrate.

In the vehicle lighting device, when an angle formed by a line segment connecting an edge of the light emitting surface of the light emitting element and an edge of the front end portion of the projection portion on the light emitting element side with respect to an extension line of the light emitting surface of the light emitting element when viewed in a direction parallel to the first surface of the substrate is θ, the following equation is satisfied: theta is more than 0 degree and less than or equal to 30 degrees.

In the lighting device for a vehicle, the light emitting element is provided at a center of the first surface when viewed in a direction perpendicular to the first surface of the substrate.

The present invention also provides a lighting device for a vehicle, including:

the lighting device for a vehicle; and

and a socket into which a connection part provided in the vehicle lighting device is inserted.

According to an embodiment of the present invention, a lighting device for a vehicle and a lighting fixture for a vehicle are provided, which can suppress an external force from being applied to a light emitting element.

Drawings

Fig. 1 is a schematic perspective view illustrating a vehicle lighting device according to the present embodiment.

Fig. 2 is a schematic perspective view illustrating the arrangement position of the joint portion according to another embodiment.

Fig. 3 is a schematic side view for illustrating a positional relationship between the tip of the convex portion and the light exit surface of the light emitting element.

Fig. 4 is a schematic diagram illustrating the vehicle lamp according to the present embodiment.

In the figure: 1-lighting device for vehicle, 10-lighting part, 11-substrate, 11 a-surface, 11 c-connecting part, 12-lighting element, 12 a-emitting surface, 12a 1-extension line, 13-line segment, 20-connecting part, 20 c-projection, 20c 1-tip part, 100-vehicle lamp, 101-lamp socket.

Detailed Description

Hereinafter, embodiments will be described by way of example with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

The vehicle lighting device 1 according to the present embodiment can be used, for example, as an interior lamp, an instrument panel lamp, a reading lamp, a brake lamp, a turn signal lamp, a tail lamp, and the like provided in an automobile, a railway vehicle, or the like. However, the application of the vehicle lighting device 1 is not limited to this.

(Lighting device for vehicle)

Fig. 1 is a schematic perspective view illustrating a vehicle lighting device 1 according to the present embodiment.

As shown in fig. 1, the vehicle lighting device 1 includes, for example, a light emitting portion 10, a connecting portion 20, and a joining portion 30.

The light emitting section 10 is provided with, for example, a substrate 11 and a light emitting element 12.

The substrate 11 has a plate shape. The planar shape of the substrate 11 may be, for example, a part of a circle including a center point. However, the planar shape of the substrate 11 is not limited to the example. The planar shape of the substrate 11 may be, for example, a polygonal shape. The planar shape of the substrate 11 may be appropriately changed according to the number, arrangement, and the like of the light emitting elements 12.

The substrate 11 may be made of an insulating material. The substrate 11 may be made of an inorganic material such as ceramic (e.g., alumina or aluminum nitride), an organic material such as phenol paper or glass epoxy, or the like. The substrate 11 may be a metal core substrate in which the surface of a metal plate is coated with an insulating material.

When the amount of heat generated by the light emitting element 12 is large, the substrate 11 is preferably made of a material having a high thermal conductivity in view of heat dissipation. Examples of the material having a high thermal conductivity include ceramics such as alumina and aluminum nitride, a highly thermally conductive resin, and a metal core substrate. The highly thermally conductive resin may be a resin obtained by mixing a resin such as PET (Polyethylene terephthalate) or nylon with a filler made of alumina or carbon.

The thickness of the substrate 11 may be, for example, about 0.5mm to 3.0 mm. However, the thickness of the substrate 11 is not limited to the example, and may be changed as appropriate.

The substrate 11 has a surface 11a (corresponding to an example of a first surface) and a surface 11d (corresponding to an example of a second surface) opposed to the surface 11 a. The surface 11a is provided with a wiring pattern 11 b. The wiring pattern 11b has mounting pads 11b 1. The light emitting element 12 is electrically connected to the mounting pad 11b 1. The wiring pattern 11b may be formed of a low-resistance metal such as copper, aluminum, or silver.

The substrate 11 may be provided with a coupling portion 11 c. For example, a pair of coupling portions 11c may be provided. The pair of coupling portions 11c may be provided at positions point-symmetrical with respect to the center point of the substrate 11. The coupling portion 11c penetrates between the

surfaces

11a and 11 d. As shown in fig. 1, the connection portion 11c may be opened on a side surface of the substrate 11. That is, the connection portion 11c may be a hole, or may be a recess that opens on both principal surfaces and side surfaces of the substrate 11.

At least one light emitting element 12 may be provided. The light emitting element 12 is provided on the surface 11a of the substrate 11. The light emitting element 12 may be provided, for example, at the center of the surface 11a of the substrate 11 when viewed from a direction perpendicular to the surface 11 a.

The light emitting element 12 may be, for example, a light emitting diode, an organic light emitting diode, a laser diode, or the like.

The light-emitting element 12 may be a surface-mount type light-emitting element such as a PLCC (Plastic Leaded Chip Carrier/Leaded Plastic Chip Carrier) type. The light emitting element 12 may be a light emitting element with a lead wire such as a shell type light emitting element. The light-emitting element 12 illustrated in fig. 1 is a surface-mount light-emitting element.

The light-emitting element 12 may be a light-emitting element packaged by COB (Chip On Board) technology. When the light-emitting element 12 is a light-emitting element packaged by the COB technique, the surface 11a of the substrate 11 may be provided with: a chip-shaped light-emitting element 12, a wire electrically connecting the light-emitting element 12 and the wiring pattern 11b, a frame-shaped member surrounding the light-emitting element 12 and the wire, a sealing portion provided inside the frame-shaped member and covering the light-emitting element 12 and the wire, and the like. Further, the sealing portion may contain a phosphor. The phosphor may be, for example, a YAG phosphor (yttrium aluminum garnet phosphor). The type of the phosphor is not limited to the example. The kind of the phosphor may be appropriately changed so that a desired emission color is obtained according to the use of the vehicle illumination device 1 or the like.

The light emitting surface 12a of the light emitting element 12 may be substantially parallel to the surface 11a of the substrate 11. For example, the light emitting element 12 mainly irradiates light in a direction perpendicular to the surface 11a of the substrate 11.

The number, size, arrangement, and the like of the light emitting elements 12 are not limited to the examples, and may be appropriately changed according to the size, the application, and the like of the vehicle illumination device 1. In addition, when a plurality of light emitting elements 12 are provided, the plurality of light emitting elements 12 may be connected in series with each other.

The connecting portion 20 has a plate shape. The planar shape of the connecting portion 20 may be, for example, a substantially rectangular shape. The connection portion 20 extends in a direction from the surface 11a toward the surface 11d of the substrate 11.

A convex portion 20c is provided at the end portion of the connection portion 20 on the substrate 11 side. The thickness of the convex portion 20c may be set to be the same as the thickness T of the connecting portion 20. For example, the convex portion 20c may be formed by cutting off the vicinity of the end portion of the connection portion 20 on the substrate 11 side. The convex portion 20c may be provided at a position corresponding to the coupling portion 11c of the substrate 11. The number of the convex portions 20c may be the same as the number of the coupling portions 11c, that is, two convex portions 20c may be provided.

As shown in fig. 1, the convex portion 20c is provided inside the coupling portion 11 c. By providing the convex portion 20c inside the coupling portion 11c, the coupling portion 20 can be aligned with the substrate 11, and the coupling portion 20 can be coupled with the substrate 11. For example, the convex portion 20c may be bonded to the inner wall of the coupling portion 11c, or may be press-fitted into the coupling portion 11 c.

That is, the connection portion 20 has a convex portion 20c provided inside the connection portion 11c on one end side.

As shown in fig. 1, the tip end portion 20c1 of the projection 20c protrudes from the surface 11a of the substrate 11. When the tip end portion 20c1 of the projection portion 20c protrudes from the surface 11a of the substrate 11, external force or the like can be suppressed from being applied to the light emitting surface 12a of the light emitting element 12.

The effect of the convex portion 20c will be described later in detail.

In order to easily replace the conventional wedge base bulb, the width W of the connecting portion 20 may be set to 5.0mm to 15.0mm, for example, about 10.0 mm. In addition, the width dimension W means: the dimension of the connecting portion 20 in the direction perpendicular to the direction in which the vehicle lighting device 1 is inserted into the socket 101.

The thickness T of the connecting portion 20 may be set to 0.5mm to 3.0mm, for example, about 2.0 mm. However, the width W and thickness T of the connection part 20 are not limited to the examples, and may be appropriately changed according to the size of the recess of the socket 101 into which the connection part 20 is inserted.

The material of the connection portion 20 may be the same as the material of the substrate 11. Heat generated in the light emitting element 12 is transferred to the connection portion 20 via the substrate 11, and is released from the connection portion 20 to the outside via the lamp socket 101. Therefore, from the viewpoint of suppressing the temperature increase of the light-emitting element 12, it is preferable to form the connection portion 20 using a material having a high thermal conductivity. Examples of the material having a high thermal conductivity include ceramics such as alumina and aluminum nitride, a highly thermally conductive resin, and a metal core substrate. In this case, the material of the connection portion 20 may be the same as the material of the substrate 11, or may be different from the material of the substrate 11.

The surface 20a of the connection portion 20 may be provided with a wiring pattern 20a 1. The wiring pattern 20a1 may be formed of a low-resistance metal such as copper, aluminum, or silver. The wiring pattern 20a1 includes, for example, a mounting pad 20a1a, a terminal 20a1b, and a connection pad 20a1 c.

The mounting pads 20a1a may be disposed in a central region of the face 20 a. Circuit elements are mounted on the mounting pads 20a1 a. For example, as shown in fig. 1, the circuit elements may be a diode 21, a resistor 22, a capacitor 23, and the like.

Since the wedge base bulb is an incandescent bulb, it is only necessary to electrically connect one lead of the pair of leads to the positive side of the power supply and the other lead to the cathode side of the power supply. I.e. wedge base bulbs are apolar. In contrast, the light emitting element 12 of the light emitting diode has polarity. Therefore, in order not to apply a reverse voltage to the light emitting element 12, a diode may be provided.

In consideration of replacing the wedge base bulb, it is preferable to provide the lighting device 1 for a vehicle with a non-polar circuit. When a nonpolar circuit is provided in the vehicle lighting device 1, the mounting to the socket 101 is not directional, as in the case of a wedge-base bulb. Therefore, the mounting work of the vehicle lighting device 1 becomes easy.

For example, if a bridge circuit (bridge diode) is configured by four diodes, the lighting device 1 for a vehicle can be provided as a non-polar circuit. The diode 21 illustrated in fig. 1 is a so-called double diode (two-element diode). If the diode 21 is a double diode, a bridge circuit can be configured by using two diodes 21, and thus the mounting area can be reduced. Therefore, the width W of the connection portion 20 is easily set to a size corresponding to the width of the portion of the wedge base bulb where the lead wire is provided.

The resistor 22 may be a surface mount type resistor, a resistor with lead (metal oxide film resistor), a film-like resistor formed by a screen printing method, or the like, for example. The resistor 22 illustrated in fig. 1 is a surface-mount resistor. When the surface mount type resistor is used, the mounting area becomes small, and therefore, the width W of the connecting portion 20 can be easily set to a size corresponding to the width of the portion of the wedge base bulb where the lead wire is provided.

Here, since the forward voltage characteristics of the light-emitting element 12 vary, the luminance (luminous flux, luminance, emission intensity, illuminance) of light emitted from the light-emitting element 12 varies when the applied voltage between the anode terminal and the ground terminal is constant. Therefore, the value of the current flowing through the light emitting element 12 is adjusted to fall within a predetermined range by the resistor 22, and the luminance of the light emitted from the light emitting element 12 falls within the predetermined range. At this time, the value of the current flowing through the light emitting element 12 is controlled within a predetermined range by changing the resistance value of the resistor 22.

In the case where the resistor 22 is a surface-mount type resistor, a resistor with lead, or the like, the resistor 22 having an appropriate resistance value may be selected in accordance with the forward voltage characteristics of the light emitting element 12. When the resistor 22 is a film-like resistor, the resistance value can be increased by removing a part of the resistor 22.

The resistor 22 may also have a function of preventing an excessive current from flowing through the light emitting element 12.

The number, size, arrangement, and the like of the resistors 22 are not limited to the examples, and the number, size, arrangement, and the like of the resistors 22 may be appropriately changed according to the number, specification, and the like of the light emitting elements 12.

For example, the capacitor 23 may be provided to cope with noise or to smooth a voltage. The capacitor 23 may be a surface mount type capacitor 23, for example. Since the surface mount type capacitor 23 can reduce the mounting area, the width W of the connecting portion 20 can be easily set to a size corresponding to the width of the portion of the wedge base bulb where the lead wire is provided.

The number, size, arrangement, and the like of the diodes 21, the resistors 22, and the capacitors 23 are not limited to the examples. For example, at least some of the elements may be provided on the surface 20b of the connection portion 20 opposite to the surface 20 a. In this case, a wiring pattern may be provided on the surface 20b, and some of these elements may be electrically connected to the wiring pattern. Further, a via wiring penetrating the connection portion 20 in the thickness direction of the connection portion 20 may be provided, and the wiring pattern 20a1 provided on the surface 20a and the wiring pattern provided on the surface 20b may be electrically connected by the via wiring.

At least some of these elements may be provided on a surface 11d of the substrate 11 facing the surface 11 a. In this case, a wiring pattern may be provided on the surface 11d, and some of these elements may be electrically connected to the wiring pattern. Further, a through-hole wiring penetrating the substrate 11 in the thickness direction of the substrate 11 may be provided, and the wiring pattern 11b provided on the surface 11a and the wiring pattern provided on the surface 11d may be electrically connected by the through-hole wiring.

The circuit elements are not limited to the examples. For example, the circuit element may be a passive element or an active element used to form a light-emitting circuit including the light-emitting element 12. For example, the circuit element may be a pull-down resistor, a positive temperature coefficient thermistor, a negative temperature coefficient thermistor, an inductor, an overvoltage absorber, a varistor, a transistor such as an FET or a bipolar transistor, a zener diode, an integrated circuit, an arithmetic element, or the like, in addition to the above elements. The integrated circuit may include at least one of a flicker circuit, a constant current circuit, and a lighting circuit (driving circuit), for example.

The circuit element may be provided in the housing 102 of the vehicle lamp 100 to which the vehicle lighting device 1 is attached. In this way, the structure of the vehicle illumination device 1 can be simplified, and therefore, the vehicle illumination device 1 can be reduced in size and cost. However, if the circuit element is provided in the vehicle lighting device 1, the vehicle lighting device 1 can be protected and made multifunctional even if the socket to which the wedge base bulb is attached is continuously used.

The pair of terminals 20a1b is provided near an end of the connection portion 20 opposite to the substrate 11 side. When the connection unit 20 is attached to the socket 101, the pair of terminals 20a1b are electrically connected to the

socket terminals

101a and 101b provided in the socket 101, respectively. At this time, by bringing one socket terminal 101a provided in the socket 101 into contact with one terminal 20a1b, the one socket terminal 101a can be electrically connected to the electrode of one polarity of the light emitting element 12 via the wiring pattern 20a1 and the wiring pattern 11 b. The other socket terminal 101b can be electrically connected to the electrode of the other polarity of the light emitting element 12 via the wiring pattern 20a1 and the wiring pattern 11 b.

The terminal 20a1b may be provided on the surface 20b of the connection portion 20. The terminals 20a1b provided on the face 20b may be provided at positions opposite to the terminals 20a1b provided on the face 20 a. The terminals 20a1b provided on the surface 20b can be electrically connected to the terminals 20a1b provided on the surface 20a via-hole wirings. If the terminal 20a1b is also provided on the surface 20b, the reliability of electrical connection with the

socket terminals

101a and 101b provided on the socket 101 can be improved.

The connection pad 20a1c may be disposed on the convex portion 20 c. The connection pad 20a1c may be provided on at least one of the surface 20a side and the surface 20b side of the projection 20 c. For example, the connection pad 20a1c provided on the surface 20b side of the convex portion 20c may be electrically connected to the connection pad 20a1c provided on the surface 20a side of the convex portion 20c via a through hole wiring.

At least a part of the connection pad 20a1c may be provided at a position protruding from the surface 11a of the substrate 11.

The bonding portion 30 electrically connects the portion of the connection pad 20a1c protruding from the surface 11a of the substrate 11 and the wiring pattern 11b provided on the surface 11a of the substrate 11. That is, the bonding portion 30 electrically connects the wiring pattern 11b of the substrate 11 and the wiring pattern 20a1 of the connection portion 20. For example, the joint 30 may be formed of a metal having a low melting point such as solder. For example, the joint portion 30 may be formed by soldering the connection pad 20a1c and the wiring pattern 11 b.

Although the case where the bonding portion 30 is provided on the surface 11a side of the substrate 11 has been described above, the position where the bonding portion 30 is disposed is not limited to this.

Fig. 2 is a schematic perspective view illustrating the arrangement position of the joint 30 according to another embodiment.

As shown in fig. 2, the joint portion 30 may be provided on the surface 11d side of the substrate 11.

For example, the joint portion 30 may connect the surface 11d of the substrate 11 and at least one of the connection portion 20 and the projection portion 20 c. At this time, the wiring pattern 11b provided on the surface 11d of the substrate 11 and the connection pad 20a1c provided on at least one of the connection portion 20 and the projection portion 20c can be electrically connected by the bonding portion 30.

Next, the effect of the convex portion 20c will be further described.

When the vehicle lighting device 1 is mounted on the socket 101 of the vehicle lighting device 100, the connecting portion 20 is pushed into the socket 101. At this time, the operator grasps the peripheral edge of the substrate 11 to push the connection part 20 into the interior of the lamp socket 101.

However, as shown in fig. 1, the light emitting element 12 is provided on a surface 11a of the substrate 11 opposite to the connection portion 20 side. Therefore, when the operator grasps the peripheral edge of the substrate 11, the hand, fingers, or the like of the operator may contact the light emitting surface 12a of the light emitting element 12. Further, when the vehicle illumination device 1 is mounted on the socket 101 or during the process of manufacturing the vehicle illumination device 1, the vehicle illumination device 1 may be dropped.

In this case, if a large force is applied to the light emitting surface 12a of the light emitting element 12, the light emitting element 12 may malfunction. In this case, for example, it is conceivable to provide a protective member surrounding the light-emitting elements 12 on the surface 11a of the substrate 11, but if the protective member is provided on the surface 11a of the substrate 11, the manufacturing cost may be increased, or the number or size of the light-emitting elements 12 may be limited.

In contrast, in the vehicle illumination device 1 according to the present embodiment, as shown in fig. 1, the distal end portion 20c1 of the convex portion 20c protrudes from the surface 11a of the substrate 11. Further, a distance H1 between the tip end portion 20c1 of the convex portion 20c and the surface 11a of the substrate 11 is larger than a distance H2 between the light emitting surface 12a of the light emitting element 12 and the surface 11a of the substrate 11.

When the distance H1 is greater than the distance H2, the finger or hand of the operator comes into contact with the tip end portion 20c1 of the convex portion 20c before coming into contact with the light emitting surface 12a of the light emitting element 12. Even if the vehicle illumination device 1 falls, the ground or the like contacts the front end portion 20c1 of the projection portion 20c before contacting the light emitting surface 12a of the light emitting element 12.

Therefore, external force can be suppressed from being applied to the light emitting surface 12a of the light emitting element 12. Further, even if an external force is applied to the light emitting surface 12a of the light emitting element 12, the force applied to the light emitting surface 12a can be reduced.

Further, since it is not necessary to provide a separate protective member or the like surrounding the light emitting elements 12, the manufacturing cost does not increase, and the number or size of the light emitting elements 12 is not limited.

In this case, if the distance H1 is set to be greater than H2 by 0.5mm or more, the external force can be effectively suppressed from being applied to the light emitting surface 12a of the light emitting element 12. Further, even if an external force is applied to the light emitting surface 12a of the light emitting element 12, the force applied to the light emitting surface 12a can be reduced.

However, if the distance H1 is set to be too large, the light emitted from the emission surface 12a is likely to enter the tip end portion 20c1 of the convex portion 20c, and therefore, the light output efficiency is lowered or desired light distribution characteristics cannot be obtained.

Fig. 3 is a schematic side view for illustrating a positional relationship between the tip end portion 20c1 of the projection 20c and the light exit surface 12a of the light emitting element 12.

As shown in fig. 3, when viewed in a direction parallel to the surface 11a of the substrate 11, an angle θ formed by a line segment 13 connecting the edge of the emission surface 12a and the edge of the tip end portion 20c1 on the light-emitting element 12 side with respect to an extension line 12a1 of the emission surface 12a may be 30 ° or less.

That is, 0 ° < θ ≦ 30 ° may be set.

In this case, if the angle θ exceeds 0 °, the external force is suppressed from being applied to the light emitting surface 12a of the light emitting element 12.

When the angle θ is 30 ° or less, the light emitted from the emission surface 12a is less likely to enter the distal end portion 20c1 of the projection portion 20 c. Therefore, a decrease in light output efficiency can be suppressed. Further, desired light distribution characteristics can be obtained.

As shown in fig. 1, the vehicle lighting device 1 may further include a cover 40 and a cover 41. The cover 40 and the cover 41 may be provided as needed.

The cover 40 may be provided on the light emitting side of the light emitting section 10. For example, the cover 40 may be provided to cover the face 11a of the substrate 11. The shape of the cover 40 may be appropriately changed in accordance with the light distribution characteristics required for the vehicle illumination device 1, and the like. For example, as shown in fig. 1, the cover 40 may be formed of a convex curved surface such as a hemispherical surface. In this way, the vehicle illumination device 1 having a wide light distribution characteristic can be provided.

The shape of the cover may be appropriately changed in accordance with the light distribution characteristics or optical characteristics required for the vehicle lighting device 1. For example, although the cover 40 illustrated in fig. 1 has a convex curved surface, the cover 40 may have a concave curved surface or a flat surface. For example, the cover 40 may have a cylindrical shape, a conical shape, a truncated conical shape, a square column shape, a square cone shape, a square truncated conical shape, or the like.

Further, the light emitting surface of the cover 40 may be provided with irregularities to scatter light. The cover 40 may be transparent or may be colored. The cover 40 may be coated with light scattering particles such as titanium oxide particles or a phosphor, or the cover 40 may contain light scattering particles such as titanium oxide particles or a phosphor. The cover 40 may be provided with holes. If the cover 40 is provided with holes, convection of air can be generated through the holes. Therefore, the light emitting element 12 can be cooled. Further, the intensity of the light emitted through the aperture can be increased, and thus the light distribution characteristics can be controlled. A film made of a material having high light reflectance (for example, aluminum or the like) may be provided on the inner wall or the outer wall of the cover 40 so that the cover 40 functions as a mirror.

The cover 41 can cover a region of the connection portion 20 where the circuit elements such as the diode 21, the resistor 22, and the capacitor 23 are provided. At this time, the region of the connection portion 20 where the terminal 20a1b is provided may be exposed outside the cover 41. The cover 41 can prevent external force from being applied to the circuit elements and can prevent dust and the like from coming into contact with the circuit elements.

(vehicle lamp)

Fig. 4 is a schematic diagram illustrating the vehicle lamp 100 according to the present embodiment.

In addition, although a case where one vehicle illumination device 1 is provided will be described below as an example, at least one vehicle illumination device 1 may be provided.

As shown in fig. 4, the vehicle lamp 100 may include the vehicle lighting device 1, a socket 101, a housing 102, and a cover 103.

As shown in fig. 4, the lamp socket 101 is provided in, for example, a housing 102. The lighting device 1 for a vehicle is attached to the socket 101. The lamp socket 101 is made of an insulating material such as resin.

Although fig. 4 illustrates the case where the lamp socket 101 and the housing 102 are provided separately, the lamp socket 101 and the housing 102 may be integrally formed.

The socket 101 is provided with a recess that opens toward one end. The vehicle lighting device 1 (the connection portion 20) is inserted into the recess. A pair of socket terminals 101a corresponding to one voltage polarity (for example, positive electrode) and a pair of socket terminals 101b corresponding to the other voltage polarity (for example, negative electrode) are provided inside the recess. As described above, if the vehicle illumination device 1 is provided with the nonpolar circuit, the mounting direction of the vehicle illumination device 1 (the connection unit 20) is not limited.

The pair of socket terminals 101a (101b) is elastically deformable. When the connection portion 20 is inserted into the recess, the

socket terminals

101a and 101b are in contact with the terminals 20a1b of the connection portion 20, respectively. A power supply or the like provided outside the vehicle lamp 100 is electrically connected to the pair of socket terminals 101a (101 b). Further, a circuit board may be provided at least at one of the inner and outer surfaces of the housing 102, and the pair of socket terminals 101a (101b) and a power source or the like may be electrically connected via the circuit board.

The housing 102 has a box shape with one end open. The frame 102 may be made of, for example, a resin that does not transmit light.

The cover 103 is provided to cover the opening of the frame 102. The cover 103 may be made of a resin or the like having light transmittance. The cover 103 may have a function of a lens or the like, or may suppress glare (glare). The cover 103 may be provided on the housing 102 so as to be openable and closable, or may be provided on the housing 102 so as to be detachable.

In addition, optical elements such as a mirror and a lens may be provided inside the housing 102.

While several embodiments of the present invention have been described above, these embodiments are merely illustrative and are not intended to limit the scope of the present invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. These embodiments and modifications thereof are within the scope and spirit of the present invention, and are also included in the utility model described in the claims and equivalents thereof. The above embodiments may be combined with each other.

Claims

1. A lighting device for a vehicle, comprising:

a light emitting element provided on the first surface of the substrate; and

a connecting portion having a plate shape and a convex portion provided inside the connecting portion on one side end portion thereof, the connecting portion extending in a direction from the first surface toward the second surface,

a tip end portion of the convex portion protrudes from the first surface of the substrate,

2. The vehicular illumination device according to claim 1,

when an angle formed by a line segment connecting an edge of a light exit surface of the light emitting element and an edge of the front end of the projection on the light emitting element side with respect to an extension line of the light exit surface of the light emitting element when viewed in a direction parallel to the first surface of the substrate is represented by θ, the following expression is satisfied: theta is more than 0 degree and less than or equal to 30 degrees.

3. The vehicular illumination device according to claim 1 or 2,

the light emitting element is disposed in the center of the first surface of the substrate when viewed from a direction perpendicular to the first surface.

4. A vehicle lamp is characterized by comprising:

the vehicular illumination device according to any one of claims 1 to 3; and